What is CVE-2023-46261?

CVE-2023-46261 is a critical-severity vulnerability in Ivanti Avalanche, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-19.

How severe is CVE-2023-46261?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Ivanti Avalanche

CVE-2023-46261

An attacker sending specially crafted data packets to the Mobile Device Server can cause memory corruption which could result to a Denial of Service (DoS) or code execution.

Vulnerability class: Buffer Overflow

Published 2023-12-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.113 (95.8th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.113 · newest: 0.113 · change: 0.000

Affected products

Ivanti Avalanche — versions 6.4.1
Microsoft Windows

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

download.wavelink.com/Files/avalanche_v6.4.2_release_notes.txt (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-46261?: CVE-2023-46261 is a critical-severity vulnerability in Ivanti Avalanche, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-19.
How severe is CVE-2023-46261?: Critical severity. CVSS v3 base score is 9.8 out of 10.